Net piler



L. A. EDERER Nov. 17, 1931.

NET FILER Filed March 8. 1930 s Sheets-Shee 1 Nov. 17, 1931.

L. A. EDERER NET PILER Filed March 8, 1930 5 Sheets-Shee 2 NOV. 17, 1931. EDERER 1,831,849

NET' FILER Filed March 8, 195 5 Sheets-Sheet 5 [7? yewfar I [ofdh/Z/QQ// g gfi all.

2 Jfz orneyur Nov. 17, 1931. Y L. AJEDERER NET FILER Filed March 8, 1930 5 Sheets-Sheet 4 43 rm 0 m mi w 4 Mi W 2 P ix ix vi RY s Patented Nov. 17, 1931 UNITED STATES PATENT OFFICE LOTHAR A. EDERER, OF CHICAGO, ILLINOIS, ASSIGNOR TO B. J. EDEBJER 00., OF CHICAGO, ILLINOIS, A CORPORATION OF ILLINOIS NET IPILER Application filed March 8, 1930. Serial No. 434,434.

This invention relates to a machine for handling, conveying and piling material. In the embodiment illustrated herewith the machine is a piling machine. The invention is, "of course, not limited to this use and the machine might be used as a conveyor whether or not it actually embodies means for piling and whether or not it is used for that purpose, no matter what means it may include.

The invention has for one object to provide a machine which may be used in conveying fabrics, and in the form illustrated it is particularly applicable to the handling,

conveying and piling of nets and .netted fabrics.

It has for one object to provide a machine which may be used in the conveying and piling of nets and which will automatically engage the net and automatically disengage itself from the net.

Another object is to provide a machine which will handle a fabric and which will move it, engage it and pile it and distribute it evenly. Another object is to provide in connection with a fabric handling machine means for distributing the material as it leaves the machine, both longitudinally and transversely of the machine. This latter ohso ject is of particular importance when the machine is used to pile material.

Qther objects will appear from time to time in the specification and claims:

y invention is illustrated more or less diagrammatically in he accompanying drawings, wherein:

Figure 1 is a side elevation of one form of the machine;

Figure 2 is a vertical cross section taken on line 22 of Figure 1, looking in the direct on of the arrow in. Figure 1;

Figure 3 is a partial transverse cross section taken on an enlarged scale on line 33 of Figure 9.. showing the fabric engaging parts and their moving mechanisms;

Figure dis a vertical cross section with some parts in elevation and with parts broken away, taken at line 4l'-l of Figure 3 and showing on an enlarged scale a portion of the driving mechanism for the material engaging elements;

Figure 5 is a plan view of one of the en-, gaging elements, as shown in Figure 4;

Figure 6 is a side elevation of a modified form in which a single material engaging heater or roll is used;

Figure 7 is an end view of the machine of Figure 6, with parts broken away and parts in section; to Figure 8 is an elevationof a modified form of distributing conveyor;

Figure 9 is a view generally similar to Figure 8, showing a modified driving mecha nism for the guiding ring.

Like parts are designated by like characters throughout the specification and drawings.

The machine may be supported or suspended from any suitable foundation or other support. As shown it is supported from a ceiling or overhead supporting member A- The several forms of the invention illustrated are all shown as supported thus from above. A may be a roof and it may join a wall or generally vertical member A In the form of the invention illustrated in Figures 1 to 5, inclusive, frame member A is supported from the memberA. Downwardly depending frame members A A engage the member A and engage and supporta bottom frame member A* which has upwardly extending portions A which are joined as at A by any suitable means to the frame member A Supported by the frame made up of the members just described is a machine frame which carries the parts of the machine to be described below; The frame has two side assemblies and each of these may be made integrally. Each of these assemblies includes an upper longitudinal member B, a lower longitudinal member B which may be longer than the upper member, one or more vertical members B joining the members 13 and B and inclined end members B B which furtherjoin the top and bottom members. The main rotating aarts of the machine are moun ed between the two side assemblies.

C is an'extension from one side of the frame assembly and it may carry a motor C which has a shaft C carrying a driving pinion C In the form of the invention illustrated in the first five figures, two rotors are used and these carry the paddles or arms which in turn carry and support the fabric engaging members. A description of one of these will suffice since they are normally identical with each other. For each of the rotors two cam members D are preferably provided. These members are fixed with relation to the rotor and may be supported on the side frame assemblies made up of the parts B, B 13 and B It is sufficient that they be fixed with relation to the rotor. Each of the cam members D has a cam groove D formed in it. This may be formed in any suitable manner, either by being formed integrally with the member D or by the use of additional parts D properly shaped and attached to the member D.

The cam groove D is shaped so as to have at its lower portion, which is generally designated by the letter X, a longer radius than it has at its upper portion, generally designated by the letter YI Supported from and in some cases forming a part of the upper members B of the side frame assemblies. are bearing supporting parts E, E. Two pairs of these are provided. Within each pair of the members E is supported a shaft E which extends laterally across the machine and carries one of the rotors. Two hub portions E are mounted on each shaft at opposed ends thereof, and each of the hub portions carries a plurality of extending channel arms E Positioned between each pair of arms E and extending from the shaft E to a point adjacent the outer end of the arms E and engaged by their channels, is a web E Each of the arms E supports a hearing or slide block E within which is slidably positioned a rod E The rod E may carry at its inner end a lateral extension E upon which is rotatably mounted a cam roller E which lies within the cam groove 1). which is itself defined and bounded by the mcmbers D D Extending laterally across the machine and between each pair of rods E is a shield member E This member, as shown. is made up ofa plurality of parts so shaped and aranged to provide slots or openings E Each of the web members E is shaped on its outer edge as at E to pro vide notches or otherwise shaped engaging parts to engage the fabric upon which the machine is operating. Each of the webs E also carries additional fabric engaging members E E which may be made as shown of angles having their exposed edges shaped like the portion E of the web E These angles are joined to the web by suitable attaching parts E. E E are angle members generally similar to the members E They engage the members E and at their ends are also attached to the arms and assist in holding the webs E in position. The shape of the cam grove is such that the rotors move and each arm is brought toward the downward position, as shown for example in the lowest arm in Figure 3, the member E is moved outwardly so as to cover the edges E E and thus to prevent their engagement or free them from engage ment with any material which may be in contact with them. As the arms move into the upper position, such for example as shown in the three upper arms of Figure 3, the member E is moved inwardly by the cam groove and so uncovers the edges E and E and thus frees them so that they may engage any material which is in contact with them.

Supported in suitable hearings in the framework is a shaft F on which is positioned a gear F with which the pinion (l is in mesh. hlounted on the same shaft F so as to be driven by it is a. pinion F which meshes y *ith a gear F on theshaft E Thus the rotation of the motor C drives the shaft E and thus drives the rotor which has been described above.

A second rotor which is identical in construction with the rotor above described is carried on a shaft G which is supported in the bearing supports E as above mentioned. The shaft E which carries the gear F has at its opposite end a gear F At the same end the shaft G carries a gear G G and G are gears suitably supported in bearings. the gear (i meshing with the gea r F and the gear G meshing with the gear G and the gear G Thus rotation of the shaft E of the left hand rotor. as shown in Figure l.

drives the shaft of the right hand rotor as shown in that figure. through the gears F". G G and G H is a shaft which may be supported in the lower members B of the side frame assemblies. It has fixed to it members H provided with extensions H which are fastened to frame members H which may be of angular cross section as shown. and which have attached to them one or more boards or plates H These boards. together with the members H make up a swinging guiding member. If is one part of a clutch. H

a mating clutch part. H is a spring tendine normally to hold the clutch members out of engagement and the member H has an upward extension H to which a lever arm H is fastened. This arm may be provided with a slot H in which one end of a connecting rod H may be adiustably positioned. At its other end the connecting rm h: adiustably mounted bearing block .i which a crank arm H which is ixed w h relation to the shaft G is attached. liv means of this mechanism when the clutch is in engagement rotation of the shaft G rotates the crank H and thus gives a swinging motion to the guiding members H 'H H is a clutch operating part which has operating handles I 15 H by means of which the clutch may be operated and controlled so as to engage and disengage the clutch parts to throw the guiding member into movement or to disengage the drive mechanism to stop its movement.

I l are supports which are fastened to the frame member A* A. There are four of the members I and between each pair extends a shaft 1 which may be fixed against movement by means of set screws 1 1 Each of the shafts I is broken at its renter and a guiding ring I is inserted. Rotation of the shaft accordingly rote s the ring. As shown the shaft is of sun icient length to 1 ermit it to be moved laterally so as to move the ring laterally across the entire width of the machine. The shaft may also be rotated so as to vary the angular position of the ring. No mechanism has been shown for moving the shaft as it can be done manually or by any suitable mechanism.

J indicates the material which is being moved through the machine. It is moved in the direction of the arrows passing through the guide ring 1 around the left hand rotor. it is engaged by this rotor and by the second or right hand rotor, and passes down and is contacted and moved by the guiding plate. The reason for a second guiding ring 1 is that the machine can take material from either side. If it were feeding from the right hand instead of from the left hand, as shown in Figure 1, the material at first passes through the right hand guide ring and then over the right hand rotor and from there on in the same line as shown.

In Figures 6, 7 and 8, a modified construction is shown. It is generally similar to that shown in the earlier figures and differs from that form mainly by the fact that only a single rotor is provided. This rotor operates generally in the same manner those al ready described but is simpler 1n construe tion. Supported from the. ceiling or other support A and preferably extending downwardly from it is a pair of arms K. Journaled adjacent the lower end of these arms is a shaft K which carries at one end a gear K At its opposite end it has fixed to it a pinion K which is in meshwith a gear K Ii L are supportingplates which may be fastened to the members K or may be hel rigid in any other suitable manner. Fnmh 0:" them is provided with members L L which, together. form cam grooves L If. The plates L are provided with extensions ll". lhey are further provided with extensions L The right hand plate L. as shown in. Figure 6. has formedon it a boss L within which a short shaft is journaled wl ich carries the pinion K above mentioned. The left hand plate L, as shown in Figure 6, is provided with a relatively short boss L and the right hand plate, as shown in the same figure. is provided with a similarly placed but preferably somewhat larger boss L Journaled in the bosses L and L is a shaft M. A guiding plate M supported from the shaft M by means of one or more hinge members M which are fixed with relation to the shaft so as to swing with it. A baflle M is formed as a part of the guiding plate M and is supported from it by means of sup ports M the baffle h 3 being somewhat separated from the plate M so that a space M is provided between the two along their adjacent edges. Fixed on the shaft M is a bell crank M to which a connecting rod M is pivoted at one end. At its other end the member M is pivoted to the pinion K so that rotation of that pinion gives a swinging motion to the member M and correspondingly to the guiding plate M Fixed in the extensions L of the plates L is a pair of guide shafts N. Mounted to slide on these guides N is a guiding ring N which is provided with a perforation N At one end the ring N is attached to an operating rod N which is provided with a bent end N N is an operating handle pivotally supported on a member N which is itself fixed on the wall member A The handle is mounted to swing and is provided with aslot N through which the bent end N of the rod N extends. The handle N may be swung and so moves the member N and the ring N longitudinally across the machine. N is a stop which may be provided to limit the movement of the ring in one direction. As shown in Figure 6, this stop is positioned in the right hand plate L.

O is a driving motor which as shown is mounted on the ceiling A. O is a motor shaft which carries a pinion O which is in mesh with the gear K on the shaft K The rotor is generally similar to that shown and described in connection with Figures 1 to 5 inclusive. K is the shaft of the rotor. It is rotated by the means described above. It is provided with hubs P from which arms P extend. Fitted into grooves in the shaft K and into grooves in the arms P are webs P which have their outer edges notched or roughened as at P It will be noticed that for each web there is but a single such roughened or notched edge instead of the three roughened edges for each web as shown in Figures 1 to 5. For each web P a double guard is provided. This guard is formed of two members sh own. They are preferably spread apart from each other slightly at each end, as indicated in Figure 6. and a block P is inserted at this point and the two members of the guard P are fastened to this block. Supported in each of the blocks P is a roller 1? which extends into the cam groove L Thus as the shaft is rotated the guards move out so as to mask the notched edges P when they are in the lower portion of their rotation, and they are moved back so as to unmask them and to free them from engagement with material when they are in the upper part of their rotation.

Q, is a bar which may be supported from the ceiling A and bent so as to form a guide or loop through which the material Q is first fed. Thereafter the material is fed through the guiding ring i 1 about the rotor, down along the upper surface of the guiding plate M and through the opening In Figure 8 a detail of a modified driving mechanism for the guiding ring is shown. The assembly is supported on the extensions L of the plates L in the manner shown in Figure 6 and 7. Similar guide rods N N are used. A guiding ring R- is used. It is provided with a perforation R and is shaped to engage or slide along the rods hi. lt provided with a nut R and a double threaded rotary shaft R passes through and is engaged by the nut R This shaft is supported in suitable hearings in the extensions L and is provided at its outer end with a sprocket R. A second sprocket R is mounted on a shaft R which is suported for rotation from any suitable support, such as that indicated diagrammatically at B A chain R meshes with the sprockets R and A hand wheel R is providedrfor rotating the shaft R and a handle R is provided for rotating the wheel. R.

In Figure 9 the driving means for moving the guiding ring R is essentialy the same as that shown in Figure 8, but is driven automatically from the machine itself. S is a sprocket driven by the machine. S is a chain engaging the sprocket R" and the sprocket S, and thus when the machine is driven the sprocket S is driven and through the chain S and the sprocket R the threaded shaft R is rotated and the guide ring R is caused to move constantly to and fro across the machine. Vhile no clutch has been shown, it is understood that a clutch might be used so that the driving mechanism for the driving ring could be disconnected and the drive ring might thus, when disconnected, be moved slightly by hand or left stationary during the operation of the machine. It will be understood that the driving mechanism guiding ring, as shown in Figure 9, might'be inserted into the form of the invention shown either in the first five figures or in Figures 6 and 7. When so inserted the machine would provide automatic guiding movement of the ring and of the swinging guiding plate so that material fed to the machine is guided automati :ally to and fro across the machine along a line generally parallel to its axis of rotation. This is accomplished, of course, by means of the guiding ring. At the same time, and automatically by means of the swinging guiding plate, the material as it is discharged from the machine is guided to and fro. Thus, if it is being fed onto a pile, for example, it is fed on the pile in layers which are folded back and forth.

it will be understood that while I have shown and described a practical operative device, many changes might be made in the size, shape, number and disposition of parts without departing mat rially from the spirit of my invention anc I wish therefore that my showing be taken as in a sense diagrammatic.

The use and operation of the machine as shown in the several figures are generally similar. .Vhile it might be used to handle, convey and pile many sorts of material, I shall describe it in connection with the handling and piling of net, although it is, of course, not limited in its use to this mate rial. If net is to be piled, a portion of it will be inserted through the guide ring and will then be moved over the rotor adjacent the guide ring, whether there is more than one rotor used or not. Since the arrangement of the cams is such that the engaging edges of the rotor are uncovered and in position for engagement when they are generally in the upper part of the rotor, the portion of the net which is put upon the top of the rotor will be at once engaged by the exposed edges. The machine may be started and if there be two rotors, they rotate toward each other, the net being fed and conveyed down between them and being engaged by both of:

them. As the several arms of the rotors move from the upper to the lower position their engaging edges are gradually covered so that as they approach their lower positions they are totally masked and they can no longer engage the net, which is thus free to pass below the machine as indicated in Figure 1 in particular, and also in Figure 7. If the swinging guiding plate is in operation it will contact the net and guide it first to the right as indicated in Figure 1, and then to the left. Thus the strip of net, as it leaves the machine, is swung back and forth so as to be piled in layers or if it is to be piled in a container, it is more evenly arranged throughout the container as a result of being thus swung back and forth. These two guiding operations may be accomplished manually or automatically. They may be accomplished simultaneously or either may be omitted or for some purposes both may be omitted and then the material is simply engaged by one or more rotor and is pulled through the machine and is discharged from it.

I claim:

1.. In a material moving assembly, a member provided with material engaging part, a mask for said part, means for moving said mask to mask said part and to unmask it, whereby it permitted to engage and disengage material, and a moving means for said mask, adapted to mask and to unmask the engaging means at suitable points in the cycle of operation.

2. In a material moving assembly, a member provided with a material engaging part, a mask for said part, means for moving said mask to mask said part and to unmask it, whereby it is permitted to engage and disengage material, and a moving and controlling means for said mask, adapted to mask and to unmask the engaging means at suitable points in the cycle of operation.

3. In a material moving assembly, a rotary member provided with a material engaging part, a mask for said part, means for moving said mask to mask said part and to unmask it, whereby it is permitted to engage and disengage material, and a moving means for said mask, adapted to mask and to unmask the engaging means at suitable points in the cycle of opertion.

4. In a material moving assembly, a rotary member provided with a material engaging part, a mask for said part, means for moving said mask to mask said part and to unmask it, whereby it is permitted to engage and disengage material, and an automatic moving means for said mask, adapted to mask and to unmask the engaging means at suitable points in the cycle of operation.

5. In a material moving assembly, a rotary member provided with a material engaging part, a mask for said part, means for moving said mask to mask said part and to un mask it, whereby it is permitted to engage and disengage material, and an automatic moving and controlling means for said mask, adapted to mask and to unmask the engaging means at suitable points in the cycle of operation.

6. In a material handling apparatus, a plurality of bodily movable material guiding means associated with said apparatus, and movably mounted driving means therefor and driving connections whereby said guiding means are moved.

7. In a material handling apparatus, a plurality of bodily movable material guiding means associated with said apparatus, and movably mounted driving means therefor and driving connections whereby said guiding means are moved, the paths of movement of the two guiding means being angularly disposed with respect to each other.

8. In a material handling apparatus, a plurality of bodily movable material guiding means associated with said apparatus, and movably mounted driving means therefor and driving connections whereby said guiding means are moved, the paths of movement of the two guiding means being angularly disposed with respect to each other, one moving longitudinally with respect to the machine and the other transversely with respect thereto.

-9. In a material handling apparatus, a material moving mechanism, a. plurality of bodily movable material guiding means associated with said apparatus, and movably mounted driving means therefor and driving connections whereby said guiding means are moved, one of said guiding means engaging and guiding material on its way to the mo ving mechanism.

10. in a material handling apparatus, a material moving mechanism, a plurality of material guiding means associated with said apparatus, and movably mounted driving means therefor and driving connections whereby said guiding means are moved, one of said guiding means engaging and guiding material on its way to the moving mechanism, the other engaging and guiding it after it leaves the machine.

11. In a material handling apparatus, a material moving mechanism, a plurality of material guiding means associated with said apparatus, and movably mounted driving means therefor and driving connections whereby said guiding means are moved, one of said guiding means engaging and guiding material on its way to the moving mechanism, the paths of movement of the two guiding means being angularly disposed with respect to each other, one moving longitudinal- 1y with respect to the machine and the other transversely with respect thereto.

12. In a material handling apparatus, a material moving mechanism, a plurality of material guiding means associated with said apparatus, and movably mounted driving means therefor and driving connections whereby said guiding means are moved, one of said guiding means engaging and guiding material on its way to the moving mechanism, the other engaging and guiding it after it leaves the machine, the paths of movement of the two guiding means being .angularly disposed with respect to each other, one moving longitudinally with respect to the machine and the other transversely with respect thereto.

18. In a material handling apparatus, a material moving mechanism, a plurality of material guiding means associated with said apparatus, and movably mounted driving means therefor and driving connections whereby said guiding means are automatically moved, one of said guiding means engaging and guiding material on its way to the moving mechanism, the other engaging and guiding it after it leaves the machine, the paths of movement of the two guiding means being angularly disposed with respect to each other, one moving longitudinally with respect to the machine and the other transversely with respect thereto.

14. In combination in a fabric handling machine, a fabric moving member, fabric engaging parts on said member, means for masking and unmasking them to prevent and permit engagement with a fabric, a fabric guiding member mounted for movement and means for moving it.

15. In combination in a fabric handling machine, a fabric moving member, fabric engaging parts on said member, means for masking and unmasking them to prevent and permit engagement with a fabric, a fabric guiding member mounted for movement and automatic means for moving it.

16LIn combination in a fabric handling machine, a fabric moving member, fabric engaging parts on said member, means for masking and unmasking them to prevent and permit engagement with a fabric, a plurality of fabric guiding members mounted for movement and means for moving them.

17. In combination in a fabric handling machine, a fabric moving member, fabric engaging parts on said member, means for masking and unmasking them to prevent and permit engagement with a fabric, a plurality of fabric guiding members mounted for movement and automatic means for moving them.

18. In combination in a fabric handling machine, a fabric moving member, fabric engaging parts on said member, means for masking and unmasking them to prevent and permit engagement with a fabric, a plurality of fabric guiding members mounted for movement and means for moving them, one of said guiding members mounted for movement in axial alignment with said fabric moving member and the other of said guiding members mounted for movement transversely with respect to the axis of said fabric moving member.

19. In combination in a fabric handling machine, a fabric moving member, fabric engaging parts on said member, means for masking and unmasking them to prevent and permit engagement with a fabric, a plurality of fabric guiding members mounted for movement and automatic means for moving them, one of said guiding members mounted for movement in axial alignment with said fabric moving member and the other of said guiding members mounted for movement transversely with respect to the axis of said fabric moving member.

20. In combination in a fabric handling machine, a fabric moving member mounted for rotation, fabric engaging parts on said member, means for masking and unmasking them to prevent and permit engagement with a fabric, a plurality of fabric guiding members, mounted for movement and automatic means for moving them, one of said guiding members mounted for movement in axial alignment with said fabric moving member and the other of said guiding members mounted for movement transversely with respect to the axis of said fabric moving member.

21. In a net handling machine, a plurality of net engaging members, means for driving them, whereby they both engage the net, and two net guiding means adapted to engage the net, driving means for said guiding members whereby they are moved to guide the net, the net engaging members including a plurality of net engaging teeth, movable masking members for said teeth, automatic means for moving said masking members to mask said teeth and for moving said masking members to unmask said teeth.

22. In a net handling machine, a plurality of net engaging members, means for driving them, whereby they both engage the net, and two net guiding means adapted to engage the net, driving means for said guiding members whereby they are moved to guide the net, the net engaging members including a plurality of net engaging teeth, movable masking members for said teeth, automatic means for moving said masking members to mask said teeth and for moving said masking members to unmask said teeth, whereby the not engaging teeth are freed to engage the net at a suitable point in their cycle of move ment and are covered to disengage them from the net at a suitable point in their cycle of movement.

23. In a net handling machine, a plurality of net engaging members, means for driving them, whereby they both engage the net, and two net guiding means adapted to engage the net, driving means for said guiding members whereby they are moved to guide the net, and means for controlling the net engaging members, whereby material is engaged by them and disengaged from them at suitable points in the cycle of movement of the machine.

24. In a net handling machine, a plurality of not engaging members, means for driving them toward each other, whereby they both engage the net, and two net guiding means adapted to engage the net, driving means for said guiding members whereby they are moved to guide the net.

25. In a net handling machine, a plurality of net engaging members, means for driving them, whereby they both engage the net, and two net guiding means adapted to engage the net, one as it enters the machine, the other as it leaves the machine, automatic driving means for said guiding members whereby they are moved to guide the net.

26. In a net handlin machine, a plurality of net engaging members, means for driving them, whereby they both engage the net, and

two net guiding means adapted to engage the means for said guiding members whereby they are moved to guide the net, one of said ly across the macmn,

guiding means adapted to guide the net longitudinally acrossthe machine.

27. In a net handling machine, a plurality of net engaging members, means for driving them, whereby they both engage the net, and two net guiding means adapted to engage the net, one as it enters the machine, the other it leaves the machine, automatic driving means for said guiding members whereby they are moved to guide the net,

one of said guiding means ada )ted to guide the net longitudinally across the machine, the other adapted to guide the net transversely with respect to the machine.

28. In a net handling machine, a plurality of net engaging rotary members, means for driving them toward each other, whereby they both engage the net, and two net guiding means adapted to engage the net, one as it enters the machine, the other as it leaves the machine, automatic, driving means for said guiding members whereby they are moved to guide the net, one of said guiding means adapted to guide the net longitudinalthe other adapted to guide the net transversely with respect to the machine, nd means for throwing said guiding means into and out of operation.

29. In a net handling machine, a plurality of not engaging rotary members, means for driving them toward each other, whereby they both engage the net, an d two net guiding means adapted to engage the net, one as it enters the machine, the other as it leaves the machine, automatic driving means for said guiding members whereby they are moved. to guide the net, one of said guiding means adapted to guide the net longitudinally across the machine, the. other adapted to guide the net transversely with respect to the machine, and means for throwing said guiding. means into and out of operation, the not engaging members including a plurality of net engaging teeth, movable masking members for said teeth, automatic means, including cams, for moving said masking members to mask said teeth and for moving said masking members to unmask said teeth, whereby the net engaging teeth are freed to engage the net at a suitable point in their cycle of movement and are covered to disengage them from the net at a suitable point in their cycle of movement.

30. A material moving apparatus, including a rotor and a material engaging part, means for covering said material engaging part and automatic means wherebysaid covering means is moved to cover and uncover said engaging part at suitable points in the cycle of rotation of the material moving apparatus, said covering part including a shield.

31. A material moving apparatus, including a rotor and a material engaging part, means for covering said material engaging part and automatic means whereby said covering means is moved to cover and uncover said engaging )art at suitable points in the cycle of rotation of the material moving apparatus, said covering partiucluding a shield, the operating means therefor including a cam, cam rollers engaging in said cam and connected to said shield.

32. A material moving apparatus, including'a rotor and a material engaging part, means for covering said material engaging part an d automatic means whereby said covering means is moved to cover and uncover said engaging part at suitable points in the cycle of rotation of the material moving apparatus, said covering part including a shield, the operating means therefor including a cam fired with relation to the rotor, cam rollers engaging in said cam and con nected to said shield.

33. A material moving apparatus, including a rotor having arms and a material enpart on said arms, means for covering said material engaging part and automatic means whereby said covering means is moved to cover and uncover said engaging 't at suitable points in the cycle of rotation of the material moving apparatus, said a part including a shield. material moving apparatus, including a rotor having arms and a material enpart on said arms, means for covering said material engagingpart and automatic means whereby said covering means is moved to cover and uncover said engaging part at suitabl points in the cycle of rotation of the material moving apparatus, said covering part including a shield, the operating means therefor including a cam fixed with relation to the rotor, cam rollers engaging in said cam and connected to said shield.

Signed at Chicago, county of Cook and State of Illinois, this 4th day of March, 1930.

LOTHAR A. EDERER. 

